NEUR 3200 Lecture Notes - Lecture 20: Neural Coding, Tectospinal Tract, Vestibulospinal Tract
17 Dec 2017
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* use central medial slides from lecture 17. 1: promotes antigravity re ex (eg. postural control, ocular motor muscles, doesn"t go through the spinal cord innervates neck muscles (balances and enables head movement) Receives input from retina and primary visual cortex. Other sensory info converges with motor info. Targets muscles via spinal cord by enhancing antigravity: medullary reticulospinal tract. Decreases antigravity, so there can be an increase in voluntary movement. Reticulospinal tracts function eg. leg muscles contract in anticipation of the arm curls to maintain balance. Postural control is not a static process at rest but a dynamic process that occurs before, during and after voluntary movements. * know this diagram (details of the pathways) slide 11. Crossing over occurs at the brain stem level. Right side of the brain controls left side of the body. Requires less stimulation compared to area 6. Corticalspinal neurons can generate coordinated movements because they can excite inhibitory interneurons.
